<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="js/vue3.js"></script>
</head>
<body>

<div id="app">
    {{message}}
</div>
<script>
    const { createApp, ref } = Vue

    createApp({
        setup() {
            const message = ref('Hello vue!11111')
            return {
                message
            }
        }
    }).mount('#app')
</script>
</body>
</html>